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The Effect of Aqueous Extract of Zanthoxylum Piperitum on Plants’ Seed Germination and Seedling Growth

Author: RuanShaoBo
Tutor: PanKaiWen；WuNing；LuoPeng
School: Chengdu Institute of Biology
Course: Ecology
Keywords: Allelopathy Pepper Seed germination Seedling growth Covering treatment
CLC: S573.9
Type: Master's thesis
Year: 2005
Downloads: 257
Quote: 3
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Abstract


Pepper (Zanthoxylum piperitum) Kawanishi arid valley region economically important crops , allelopathy is one of the reasons of continuous cropping obstacles pepper . System pepper Allelopathy help us to understand and eventually solve pepper continuous cropping obstacles . This article by Dahongpao (10a Health) of leaves , stems, roots , and pepper forest soil water immersion of alfalfa ( Medicago sativa) , cabbage (Brassisca oleracea vat.capitata) and several plant pepper seeds germination and seedling growth the impact of the system to evaluate the allelopathic potential use by HPLC analysis Determination of Four flooding ; simulate natural conditions litter decomposition the pepper itself toxic effects , pepper foliage as mulch to cover the processing of the annual pepper seedlings ; liquid contained allelochemicals . The main results are as follows : 1 pepper in different parts of the understory soil water immersion on seed germination and radicle length Allelopathy basic exhibit low and promote high suppression law . The same concentration level , the strongest inhibition of leaf aqueous extracts of the stem and root aqueous extracts followed , soil water immersion minimum. 40g / L leaf aqueous extracts allows the test plants seeds taproot shorter thicker root hair number reduce , inhibit the growth of stem ; of vascular cylinder organizations differentiation is not obvious . Soaked in water saturated the point ( 8hs ) , 40 and 30g / L water extracts of pepper leaves can significantly inhibit alfalfa seed water absorption . Light can improve alfalfa seed germination rate , increase the pepper leaf aqueous extracts of the inhibition strength . 12hs / d light conditions , 40g / L pepper leaf aqueous extracts of alfalfa inhibit change over time ; 20 g / L aqueous extracts to promote the role of performance in the 48 ~ 84hs . The the the 0h / d light conditions , both flooding Allelopathy with the growth time , from inhibition to promote . 12hs / d light conditions , seedling growth of alfalfa is more sensitive response to aqueous extracts . 3 flooding liquid and coverage processing of the annual pepper seedlings , plant height, ground diameter , crown growth and net photosynthetic rate have different degrees of inhibition . The same concentration level , the leaf aqueous extracts of the strongest inhibition no apparent regularity between the other three treatments . When inhibition the pepper by flooding solution ( flooding or litter coverage ) , the plants tend to increase the proportion of aboveground .

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CLC: > Agricultural Sciences > Crop > Economic crops > Spice crops > Other
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